driftLimiter
Structural
- Aug 28, 2014
- 1,364
Hello fellow engineers.
Today I want to see what others are doing to address the overturning of a light frame wood building ontop of a concrete podium structure.
There are two approaches I have seen in the past.
Smeared - Take the global overturning of the upper structure, scale by R factors according to dual-stage analysis technique, then apply a uniform moment to the podium level.
Point Loads - Model actual hold down overturning forces in the location the are planned.
The elements I am going to be looking into are the podium shear walls, and foundations. The slab design will include point loads from the shear wall hold downs.
The goal of this is both for podium wall design, and foundation design forces. For podium walls I want to capture any loads opposite of compression because that will be worst case for the wall interaction.
Any other ideas? or Pros/Cons you guys can think of doing this either way I have proposed.
One major Con of Point Loads is having to go in and locate all the locations and apply appropriate loading. I would prefer the smeared technique but I'm worried that effects of overturning are more localized, (i.e. the slab isn't 'rigid' in the out of plane direction.
Today I want to see what others are doing to address the overturning of a light frame wood building ontop of a concrete podium structure.
There are two approaches I have seen in the past.
Smeared - Take the global overturning of the upper structure, scale by R factors according to dual-stage analysis technique, then apply a uniform moment to the podium level.
Point Loads - Model actual hold down overturning forces in the location the are planned.
The elements I am going to be looking into are the podium shear walls, and foundations. The slab design will include point loads from the shear wall hold downs.
The goal of this is both for podium wall design, and foundation design forces. For podium walls I want to capture any loads opposite of compression because that will be worst case for the wall interaction.
Any other ideas? or Pros/Cons you guys can think of doing this either way I have proposed.
One major Con of Point Loads is having to go in and locate all the locations and apply appropriate loading. I would prefer the smeared technique but I'm worried that effects of overturning are more localized, (i.e. the slab isn't 'rigid' in the out of plane direction.
